源码安装memcached和php memcache扩展

注：以下安装步骤以centos6.5系统为例。

一、安装前准备

1、下载源码包

http://www.memcached.org/

目前最新版本是http://www.memcached.org/files/memcached-1.4.24.tar.gz

2、安装libevent

由于memcached依赖于libevent库,因此需要安装libevent
#yum install libevent libevent-devel

二、安装memcached

1、创建memcached用户

#useradd -d /var/run/memcached/ -s /sbin/nologin -c “Memcached daemon” memcached

2、解压源码包

#tar zxvf memcached-1.4.24.tar.gz

3、编译安装

#cd memcached-1.4.24
#./configure –prefix=/usr/local/memcached
#make && make install

4、memcached常用参数说明

-m memcache最大可用内存数（单位：M）
-u 用户
-l 监听IP
-p 端口号

三、添加service脚本

#vi /etc/rc.d/init.d/memcached

内容如下

#! /bin/sh
#
# chkconfig: – 55 45
# description: The memcached daemon is a network memory cache service.
# processname: memcached
# config: /etc/sysconfig/memcached
# pidfile: /var/run/memcached/memcached.pid

# Standard LSB functions
#. /lib/lsb/init-functions

# Source function library.
. /etc/init.d/functions

IP=127.0.0.1
PORT=11211
USER=memcached
MAXCONN=1024
CACHESIZE=64
OPTIONS=””

# Check that networking is up.
. /etc/sysconfig/network

if [ “$NETWORKING” = “no” ]
then

 exit 0

fi

RETVAL=0
prog=”memcached”
pidfile=${PIDFILE-/var/run/memcached/memcached.pid}
lockfile=${LOCKFILE-/var/lock/subsys/memcached}

start () {

echo -n $"Starting $prog: "
# Ensure that /var/run/memcached has proper permissions
if [ "`stat -c %U /var/run/memcached`" != "$USER" ]; then
    chown $USER /var/run/memcached
fi

daemon --pidfile ${pidfile}  /usr/local/memcached/bin/memcached -d -l $IP  -p $PORT -u $USER  -m $CACHESIZE -c $MAXCONN -P ${pidfile} $OPTIONS
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch ${lockfile}

}
stop () {

echo -n $"Stopping $prog: "
killproc -p ${pidfile} /usr/local/memcached/bin
RETVAL=$?
echo
if [ $RETVAL -eq 0 ] ; then
    rm -f ${lockfile} ${pidfile}
fi

}

restart () {

    stop
    start

}

# See how we were called.
case “$1” in
start)

start
;;

stop)

stop
;;

status)

status -p ${pidfile} memcached
RETVAL=$?
;;

restart|reload|force-reload)

restart
;;

condrestart|try-restart)

[ -f ${lockfile} ] && restart || :
;;

*)

echo $"Usage: $0 {start|stop|status|restart|reload|force- reload|condrestart|try-restart}"
RETVAL=2
    ;;

esac

exit $RETVAL

四、测试

1、启动memcached服务

#/etc/rc.d/init.d/memcached start
默认memcached服务监听在127.0.0.1:11211

2、测试

#telnet 127.0.0.1 11211

输入 stats，正常显示如下，说明安装成功

Trying 127.0.0.1…
Connected to 127.0.0.1.
Escape character is ‘^]’.
stats
STAT pid 12246
STAT uptime 2444
STAT time 1442302696
STAT version 1.4.24
STAT libevent 2.0.22-stable
STAT pointer_size 64
STAT rusage_user 0.089986
STAT rusage_system 0.027995
STAT curr_connections 5
STAT total_connections 7

STAT connection_structures 6

五、安装memcached-tool工具

memcached-tool是memcached监控工具，是一个perl脚本，可以直接运行。命令用法如下。

Usage: memcached-tool <host[:port]> [mode]

   memcached-tool 10.0.0.5:11211 display    # shows slabs
   memcached-tool 10.0.0.5:11211            # same.  (default is display)
   memcached-tool 10.0.0.5:11211 stats      # shows general stats
   memcached-tool 10.0.0.5:11211 dump       # dumps keys and values

六、安装php memcache扩展

1、下载源码包

memcache-3.0.8.tgz

2、安装memcache扩展

#tar zxvf memcache-3.0.8.tgz
#cd memcache-3.0.8
#/usr/local/php/bin/phpize
#./configure –with-php-config=/usr/local/php/bin/php-config
#make && make install

3、修改配置文件php.ini

添加 extension=memcache.so

4、测试

重启nginx和php-fpm，查看phpinfo（）显示如下有信息，说明安装成功。

Registered save handlers files user memcache

memcache support enabled